Restorative Dentistry and Endodontics

  • 제35권6호
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  • Pages.479-485
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  • 2010
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  • 2234-7658(pISSN)
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  • 2234-7666(eISSN)
대한치과보존학회 (The Korean Academy of Conservative Dentistry)
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시멘트 도포 방법에 따른 포스트의 push-out 접착 강도 비교

Comparison of push-out bond strength of post according to cement application methods

  • 김서령 (부산대학교 치의학전문대학원 치과보존학교실) ;
  • 염지완 (부산대학교 치의학전문대학원 치과보존학교실) ;
  • 박정길 (부산대학교 치의학전문대학원 치과보존학교실) ;
  • 허복 (부산대학교 치의학전문대학원 치과보존학교실) ;
  • 김현철 (부산대학교 치의학전문대학원 치과보존학교실)
  • Kim, Seo-Ryeong (Department of Conservative Dentistry, Pusan National University School of Dentistry) ;
  • Yum, Ji-Wan (Department of Conservative Dentistry, Pusan National University School of Dentistry) ;
  • Park, Jeong-Kil (Department of Conservative Dentistry, Pusan National University School of Dentistry) ;
  • Hur, Bock (Department of Conservative Dentistry, Pusan National University School of Dentistry) ;
  • Kim, Hyeon-Cheol (Department of Conservative Dentistry, Pusan National University School of Dentistry)
  • 투고 : 2010.08.30
  • 심사 : 2010.10.18
  • 발행 : 2010.11.30
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초록

연구목적: 이 연구의 목적은 레진 시멘트의 포스트 공간 내 적용 방법에 따른 포스트의 push-out접착 강도를 비교하는 것이었다. 연구 재료 및 방법: 30개의 발거된 하악소구치를 사용하여 시멘트의 적용 방법에 따라 세 그룹으로 나누었는데 lentulo-spiral을 이용하여 포스트 공간 내에 레진 시멘트를 적용하는 그룹 (group Lentulo), 직접 포스트 표면에 레진 시멘트를 도포하는 그룹 (group Direct), elongation tip을 이용하여 포스트 공간 내에 레진 시멘트를 적용하는 그룹 (group Elongation tip)으로 나누었다. 근관을 성형, 충전한 뒤 Rely-X post drill을 사용하여 포스트 공간을 형성하였고, Rely-X fiber post를 Rely-X Unicem 적용하여 광중합 하였다. 시편을 아크릴릭 레진에 포매 하고 저속 절단기로 치아 장축에 수직으로 절단하여, 하나의 치아에서 치관부, 중앙, 근단부의 세 개의 시편을 얻었다. 절단한 시편을 Universal Testing Machine으로 push-out 접착 강도를 측정하였다. 접착 실패가 일어난 시편을 수술용 현미경 하에서 관찰하여 그 실패 양상을 결정하였다. 결과: 치근의 위치에 따른 push-out 접착 강도는 유의한 차이를 보였으며, 전용의 elongation tip을 사용한 그룹이 가장 높은 push-out 접착 강도를 나타냈다. 결론: 레진 시멘트를 포스트에 직접 적용하거나 lentulo-spiral을 사용하는 기존의 방법에 비해 elongation tip을 사용하는 것이 self-adhesive 계면의 결함을 줄이고 근관치료한 치아의 수복 성공율을 높일 수 있을 것으로 생각된다.

Objectives: The aim of this study was to compare the push-out bond strengths of resin cement/fiber post systems to post space dentin using different application methods of resin cement. Materials and Methods: Thirty extracted human premolars were selected and randomly divided into 3 groups according to the technique used to place the cement into root canal: using lentulo-spiral instrument (group Lentulo), applying the cement onto the post surface (group Direct), and injecting the material using a specific elongation tip (group Elongation tip). After shaping and filling of the root canal, post space was drilled using Rely-X post drill. Rely-X fiber post was seated using Rely-X Unicem and resin cement was light polymerized. The root specimens were embedded in an acrylic resin and the specimens were sectioned perpendicularly to the long axis using a low-speed saw. Three slices per each root containing cross-sections of coronal, middle and apical part of the bonded fiber posts were obtained by sectioning. The push-out bond strength was measured using Universal Testing Machine. Specimens after bond failure were examined using operating microscope to evaluate the failure modes. Results: Push-out bond strengths were statistically influenced by the root regions. Group using the elongation tip showed significantly higher bond strength than other ways. Most failures occurred at the cement/dentin interface or in a mixed mode. Conclusions: The use of an elongation tip seems to reduce the number of imperfections within the selfadhesive cement interface compared to the techniques such as direct applying with the post and lentulospiral technique.

키워드

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피인용 문헌

  1. Micro-computerized tomography analysis of cement voids and pull-out strength of glass fiber posts luted with self-adhesive and glass-ionomer cements in the root canal vol.30, pp.14, 2016, https://doi.org/10.1080/01694243.2016.1155911
  2. study vol.38, pp.4, 2013, https://doi.org/10.5395/rde.2013.38.4.215
  3. Effects of dentin moisture on the push-out bond strength of a fiber post luted with different self-adhesive resin cements vol.38, pp.4, 2013, https://doi.org/10.5395/rde.2013.38.4.234
  4. Pull-out bond strength of a self-adhesive resin cement to NaOCl-treated root dentin: effect of antioxidizing agents vol.39, pp.2, 2014, https://doi.org/10.5395/rde.2014.39.2.95